CEMAC is an international organization for sub-regional integration, whose main objective is the harmonious and reciprocal development of its member states. In the hope of achieving this objective, the Community has set up a law governing the actions of its protagonists. This law, if respected by all, would promote the Community's development. This logic, however, justifies the sacralization of the principle of legality within CEMAC. This work contributes to demonstrating how, in concrete terms, the legality of acts is guaranteed, or how this legality is ensured. We have been able to note with reservation that the CEMAC is a community of law. At the very least, at the textual level (legislative provisions), through upstream norms it prevents the illegality of acts by conditioning their elaboration to imperatives of several orders, thus leading either to the validity or invalidity of the act; downstream, through its institutions, it sanctions non-compliance with the law in general, while giving all persons the possibility of asserting their rights by bringing the matter before the community judge.